Revealing Cosmic Rotation
arXiv:1207.6640 · doi:10.1103/PhysRevD.86.083002
Abstract
Cosmological Birefringence (CB), a rotation of the polarization plane of radiation coming to us from distant astrophysical sources, may reveal parity violation in either the electromagnetic or gravitational sectors of the fundamental interactions in nature. Until only recently this phenomenon could be probed with only radio observations or observations at UV wavelengths. Recently, there is a substantial effort to constrain such non-standard models using observations of the rotation of the polarization plane of cosmic microwave background (CMB) radiation. This can be done via measurements of the -modes of the CMB or by measuring its TB and EB correlations which vanish in the standard model. In this paper we show that correlations-based estimator is the best for upcoming polarization experiments. The based estimator surpasses other estimators because it has the smallest noise and of all the estimators is least affected by systematics. Current polarimeters are optimized for the detection of -mode polarization from either primordial gravitational waves or by large scale structure via gravitational lensing. In the paper we also study optimization of CMB experiments for the detection of cosmological birefringence, in the presence of instrumental systematics, which by themselves are capable of producing correlations; potentially mimicking CB.
10 pages, 3 figures, 2 tables
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- Self-Calibration of CMB Polarization Experiments
- The Atacama Cosmology Telescope: Constraints on Cosmic Birefringence
- Self-Calibration of BICEP1 Three-Year Data and Constraints on Astrophysical Polarization Rotation
- Future CMB constraints on cosmic birefringence and implications for fundamental physics
- Precision Tests of Parity Violation Over Cosmological Distances
- POLOCALC: a Novel Method to Measure the Absolute Polarization Orientation of the Cosmic Microwave Background
- Including birefringence into time evolution of CMB: current and future constraints
- CMB Faraday rotation as seen through the Milky Way
- Searching for primordial magnetism with multi-frequency CMB experiments
- Constraints on cosmological birefringence energy dependence from CMB polarization data
- Inflationary Birefringence and Baryogenesis
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- Exact CMB B-mode power spectrum from anisotropic cosmic birefringence
- Finding Evidence for Inflation and the Origin of Galactic Magnetic Fields with CMB Surveys
- Reinforcement learning assisted non-reciprocal optomechanical gyroscope
- Constraining cosmic polarization rotation and implications for primordial B-modes